On 7/2/25 18:33, Daniel Wagner wrote:
Ensure that IRQ affinity setup also respects the queue-to-CPU mapping
constraints provided by the block layer. This allows the SCSI drivers
to avoid assigning interrupts to CPUs that the block layer has excluded
(e.g., isolated CPUs).
Signed-off-by: Daniel Wagner <w...@kernel.org>
---
drivers/scsi/fnic/fnic_isr.c | 7 +++++--
drivers/scsi/hisi_sas/hisi_sas_v3_hw.c | 1 +
drivers/scsi/megaraid/megaraid_sas_base.c | 5 ++++-
drivers/scsi/mpi3mr/mpi3mr_fw.c | 6 +++++-
drivers/scsi/mpt3sas/mpt3sas_base.c | 5 ++++-
drivers/scsi/pm8001/pm8001_init.c | 1 +
drivers/scsi/qla2xxx/qla_isr.c | 1 +
drivers/scsi/smartpqi/smartpqi_init.c | 7 +++++--
8 files changed, 26 insertions(+), 7 deletions(-)
>
All of these drivers are not aware of CPU hotplug, and as such
will not be notified when the number of CPUs changes.
But you use 'blk_mq_online_queue_affinity()' for all of these
drivers.
Wouldn't 'blk_mq_possible_queue_affinit()' a better choice here
to insulate against CPU hotplug effects?
Also some drivers which are using irq affinity (eg aacraid, lpfc) are
missing from these conversions. Why?
Cheers,
Hannes
--
Dr. Hannes Reinecke Kernel Storage Architect
h...@suse.de +49 911 74053 688
SUSE Software Solutions GmbH, Frankenstr. 146, 90461 Nürnberg
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